Big is a romantic series in which a pediatrician called Seo Yoon Jae in his mid-thirties comes to hold a spirit of an 18-year-old boy Kang Kyung Joon (played by Shin Won Ho) after a tragic accident falling in love with a female professor. Kong Yoo portrays the character Seo Yoon Jae who appears as a “lucky guy” because he is loved by two lead actresses in the series, Lee Min Jung and Suzy.

When Seo begins to hold Kang’s spirit, he goes through absurd situations with the student’s teacher, Gil Da Ran (played by Lee Min Jung). Things get worse as he gets involved in a relationship with Kang’s ex-girlfriend, Jang Ma Ri (played by Suzy), who calls him to be her “husband.”

In the poster that was revealed on May 23, Lee Min Jung and Suzy are posing in a mysterious way having Kong Yoo at the center, as if to describe their twisted situation. It seems to bring fans’ expectations even higher as the question on how this complex, yet fun love relationships will develop. The first episode airs on June 4 at 9:55 p.m.